/*************************************************************************
  dw_banners.js   version date: Feb 2004

  This code is from Dynamic Web Coding at http://www.dyn-web.com/
  Copyright 2001-4 by Sharon Paine 
  See Terms of Use at http://www.dyn-web.com/bus/terms.html
  regarding conditions under which you may use this code.
  This notice must be retained in the code as is!
*************************************************************************/

bannerObjects = {};
function bannerObj(id, delay, bMouse) {
  this.id = id; this.delay = delay; this.items = []; this.timer = null;
  bannerObjects[this.id] = this;
  this.animString = "bannerObjects." + this.id;
  if (bMouse) { // set up pause/resume onmouseover/out
    var el = document.getElementById(this.id);
    if (el) {
      el.onmouseover = bannerObj.clearTimer;
      el.onmouseout = bannerObj.restartTimer;
    }
  }
}

bannerObj.prototype.ctr = 0;
bannerObj.prototype.addItem = function(sHtml) {
 	this.items[this.items.length] = sHtml;
}

bannerObj.prototype.rotate = function() {
  var el = document.getElementById(this.id);
  if ( el && typeof el.innerHTML != "undefined" ) {
    el.innerHTML = this.items[this.ctr];
    if (this.ctr < this.items.length-1) this.ctr++;
    else this.ctr = 0;
    this.timer = setTimeout(this.animString + ".rotate()", this.delay);
  }
}

// these 2 functions called onmouseover/out of banner el
bannerObj.clearTimer = function() { clearTimeout(bannerObjects[this.id].timer); }
 
bannerObj.restartTimer = function(e) {
  e = e? e: window.event;
  var toEl = e.relatedTarget? e.relatedTarget: e.toElement;
  if ( this != toEl && !contained(toEl, this) ) {
    var animStr = bannerObjects[this.id].animString;
    bannerObjects[this.id].timer = setTimeout(animStr + ".rotate()",500);
  }
}  

// returns true of oNode is contained by oCont (container)
function contained(oNode, oCont) {
  if (!oNode) return; // in case alt-tab away while hovering (prevent error)
  while ( oNode = oNode.parentNode ) if ( oNode == oCont ) return true;
  return false;
}

// adapted from act_api.js by Dan Pupius of www.13thparallel.org
var imageHandler = {
  imgs: [],
  path: "",
  preload: function() {
    var i, img;
    for (i=0; arguments[i]; i++) {
      img = new Image();
      img.src = this.path + arguments[i];
      this.imgs[this.imgs.length] = img;
    }
  }
}